The constant mole ratio denitration control strategy has poor dynamic process control effect and robustness. To optimize the denitration control strategy

the scheme of dynamic matrix predictive control(DMC) combined with feedforward control structure is proposed. Moreover

in order to improve the operation efficiency of the DMC algorithm

the aggregation algorithm is put forward to design the simplified algorithm for the dynamic matrix predictive control. In addition

the particle swarm optimization algorithm is used to design the constraint of control quantity

which can limit the output of the prediction algorithm in a practical range. Finally

the improved denitration control algorithm is applied to flue gas denitration control system in a power plant. The practical results show that

the improved denitration control system has the advantages of quick response

strong robustness and anti-interference

and the control effect is improved significantly.